Method and apparatus for detecting state of charge of battery
First Claim
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1. A method for detecting a state of charge (SOC) of a battery, comprising the steps of:
- (a) inputting a pulse to the battery to measure a response curve of the battery associated with the pulse;
(b) determining a set of parameters of the battery;
(c) calculating a simulated curve of the battery associated with the pulse according to the set of the parameters;
(d) comparing a difference between the simulated curve and the response curve to a predetermined threshold;
(e) when STEP (d) determines the difference is larger than the predetermined threshold, returning to STEP (b); and
(f) otherwise, querying a corresponding relationship according to the set of the parameters so as to determine the SOC of the battery, in which the corresponding relationship records a correspondence between the SOC of the battery and a resistance of a charge transfer resistor (Rct) of the battery.
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Abstract
A method for detecting a state of charge (SOC) of a battery is disclosed. The method includes inputting a pulse to the battery for receiving a response curve of the battery associated with the pulse inputted to the battery, determining a set of parameters for preparing a simulated curve, comparing a difference between the response curve and the simulated curve, determining whether the difference between the simulated curve and the response curve is less than a predetermined threshold before further utilizing the parameters to determine the SOC from a corresponding relationship.
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Citations
17 Claims
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1. A method for detecting a state of charge (SOC) of a battery, comprising the steps of:
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(a) inputting a pulse to the battery to measure a response curve of the battery associated with the pulse; (b) determining a set of parameters of the battery; (c) calculating a simulated curve of the battery associated with the pulse according to the set of the parameters; (d) comparing a difference between the simulated curve and the response curve to a predetermined threshold; (e) when STEP (d) determines the difference is larger than the predetermined threshold, returning to STEP (b); and (f) otherwise, querying a corresponding relationship according to the set of the parameters so as to determine the SOC of the battery, in which the corresponding relationship records a correspondence between the SOC of the battery and a resistance of a charge transfer resistor (Rct) of the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for detecting state of charge (SOC) of a battery, comprising:
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a pulse generator, which outputs a pulse to the battery; an analog/digital converter, which detects the battery; and a controller coupled to the pulse generator and the analog/digital converter, wherein the controller controls the pulse generator to output the pulse and measures a response curve of the battery associated with the pulse through the analog/digital converter, wherein the controller calculates a simulated curve of the battery associated with the pulse and determines whether a difference between the simulated curve and the response curve is larger than a predetermined threshold; wherein the simulated curve is determined according to a set of parameters of the battery associated with the pulse, the controller determines the SOC of the battery with the set of the parameters by querying a corresponding relationship, and the corresponding relationship records a correspondence between the SOC of the battery and a resistance of a charge transfer resistor of the battery. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification